Calculating machine



May 4 1926.

. F. A. HART CALCULATING MACHINE Filed Sept. 12, 1924 s Sheets-Sheet 1 INVENTOR i WITNESSES BY 7 ATTORNEY May 4 1926. 1,583,290

F. A. HART CALCULATING MACHINE Filed Sept. 12, 1924 3 Sheets-Sheet 2 WITNESSES INYENTOR 465?. v g 2) BY 7 v .49, 1 W g QM huvc M ATTORNEY @51 May 4 1926.

F. A. HART CALCULATING MACHINE Filed Sept. 12, 1924 3 Sheets-Sheet :5

INVENTOR mmr E WITNESSES FHA-UL ATTORNEY Patented May 4,, 1926.

FREDERICK Al HART, OF NEW BRITAIN,

1,583,290 PATENT OFFICE.

CONNECTICUT, ASSIGNOR TO REMINGTON ACCOUNTING MACHINE CORPORATION, on NEW YORK, N. Y., A CORPORATION OF NEW YORK.

CALCULATING MACHINE.

Application filed September 12, 1924. Serial No. 737,260.

To all whom it may concern:

Be it-known that I, FREDERICK A. HART, citizen of the United States, and resident of 'New Britain,-in the county'of Hartford and State of Connecticut, have invented certain new and useful Improvements in Calculating Machines, of which the following is a specification.

Thisinvention relates to calculating machines and especially to combined typewriting and calculating machines.

The invention has for one of its objects to provide certainjmproveme'nts in the framing of combined typewriting and calculating machines and in the casing that encloses the mechanism.

The invention has for another object to provide certain improvements in the reversing mechanism of such machines.

To the above and other ends the invention consists in the herein described and claimed features of construction and combinations and arrangements of parts.

On'the accompanying sheets of drawings,

-2 on which like reference numerals designate like parts in different views;

Figure 1 shows a portion of 2. Remington accounting .machine embodying the invention, and consists of a front and sectional elevation of the machine frame, and a front elevation of'framework that supports the calculating mechanism, and of three coversupporting brackets, and of mechanism that includes features of the invention;

. Figure 2 is a perspective of a fragment of V the frame and perspectives of the three brackets and two covers which the brackets support butwhich are shown detached from the brackets;

Figure 3, a sectional elevation of a fragmerit of. the machine, this fragment including-the right front post and being on the right of plane 33 Fig. 1;

Figure 4, a horizontal section and plan of another fragment which includes a portion of the left front post, the section being in planes 44, Fig. 1; and

Figure 5, a perspective of a fragment in-' cluding much of what is illustrated in Fig. 4. w

Machines to which the invention is applicable may vary in construction, but it is especially applicable to and useful in the Remington accounting machine, which consists of a Remington typewriting machine compatents just mentioned, the calculating "be referred to as the slotted segment machine.

bined with the VVahl computing mechanism.

The specific machine to which I have shown my improvements applied, is that shown and described in the patent to John G. Wahl, No. 1,270,471, dated June 25, 1918, but modified in respect to the cross-truck and its associated devices as described in my Patent N 0. 1,464,095, dated Aug. 7, 1923. It should also be explained that in the two mechanism is shown attached toa No. 11- Remington typewriter, whereas in the present instance I have attached the calculating mechanism to a later Remington model which, to distinguish it from the N o. 11, may

For the purposes of the present invention it may be said that the essential differences between the two typewritermodels are that in the slotted segment machine the top plate is about one-half of an inch lower, and the key-board is set about three-eighths of an inch farther back than in the No. 11. "I have more than compensated for the latter difference by setting the calculating mechanism back (rearward) more. than threeeighths of an inch.

In the following description I shall for convenience refer to a certain portion of the frame of the accounting machine as the typewriter frame and to a certain other gportion as the calculator frame or framework.

The typewriter-frame represented in the drawings which show its novel portions and others which are old in typewriting machines, is composedof a base, two front posts, tworear posts, and a top-plate resting on and .fastened to the posts. The base 1, in which the keyboard-frame 2 and crossbar 3 are included, the left front post 4, and the two rear posts (not shown), are the base and corresponding three posts of'a Remington slotted'segment typewriter. On the base, at the ends of cross-bar 3 and near the 100 back of the base and at its sides, are four flat beds on each of which a post stands, and the posts are fastened by screws to the base. The right front post 5 is of novel construction. It includes the protruding 105 foot portion 6 formed on the front of the post at its lower end, and this post stands on bed 7, the front of portion 6 being even with the front edge of the bed and the post being attached to the frame by the screw 8 passing through bed 7 and into the protrud ing portion 6 of the post. All of the post except this protruding portion is behind a vertical plane that is transverse to the length of the frame and cuts the base at the back of the protrusion 6. In short, the upright part or shaft of this post is set some distance back of the position occupied by a normal typewriter post. The post is prevented from turning on screw dowel-pin 9 passing through a hole in the frame and into the post. y

, The top-plate 10, which is a casting on which and near the front of which are the integrally. cast lugs 11 and 12, is fastened to the front posts 4 and 5 by the screws 13 and 14, and to the rear posts by other screws, the top-plate being also connected to post 5 by the dowel-pin 15. The lugs 11 and 12 support the front rail of the track on which the typewriter carriage travels. They are the same as the front rail-supporting lugs of a Remington typewriter, and all of that portion of the top-plate 10 which is behind the lugs 11 and 12 is the same as the corresponding portion of the regular typewriter top-plate. Two other lugs, that form sup ports for the framework of the calculating mechanism and that are integrally cast with the rest of the top-plate 10, stand on the front of the top-plate next to the front ends of the edges 18 and 17 of the central opening therein. These lugs, 18 and 19, are taller than lugs 11 and 12 and extend upward and forward from the front of the topplate, and have front faces 20 and 21 which are in a vertical plane that cuts the base of I the frame, near the front edges of the beds ej-chjgs, and the J b of the front posts. All of the top-plate 10, except portions of these lugs and the. small portion 22 which lies on and extends in front of the upper en of post 4, is behind the vertical plane that contains the lower edges of the front faces of lugs 11 and 12. cept at its extreme left hand part, this new top-plate does not extend as far forward as the regular typewriter top-plate.

The framework of,-the calculating mechanism includes almost exactly the same parts as heretofore employed and as described in' the two Pa-tents Nos. 1,270,471 and 1,464,095

' hereinbefore 're'fr r ed' itp,i1rny present 1m- 'pro'vements" consisting-chiefly of additions to said'l-frajin'ev'iork'l 'jSalid framework includes the cast beam 23,-"pla'tes rigidly attached to and extending forward and downward from the beam, cross-rods attached to and supported by some ofthe plates, and other plates attached to and supported by cross-rods. -This beam -23' is supported by the lugs 18 an'd' 19. the bacl a o f the beam being in contact; with-the bes 20"a-nd 21 of y I k being tightly-fastened-to the lugsilby 'the serews 24-and 25.

Said. screws a're -the-sameE-as' 'formerly em- 8 by the ployed in the Remington accounting machine, the integral lugs 18, 19 taking the place of sheet metal brackets formerly used and which were attached to the top plate of the typewriter frame; but the lugs are set back (rearward) from,the position of the former brackets, this putting the whole calculating mechanism rearward of its former position. The new top-plate and post 5 are, as above described, so constructed as to make this back-setting possible. The plates 26 and 27, fastened at their upper ends to the beam and rigidly connected together at their lower ends by the cross-rod 28, form the ends of the cross-footer section of the framework. This section which is next to the right end of the framework and extends downward from the beam to within not very far from the base 1, passes in front of post 5, and it supports the cross-totalizer and its carriage to which are attached rollers that travel on the cross-rods or rails 29 and 30, as shown and explained in the above mentioned Patent No. 1,464,095. The above described frame supports the typewriting mechanism of the accounting machine just as it has heretofore been supported by the frame commonly embodied in typewriting machines and accounting machines.

The present improvements include covers and cover-supporting brackets which form a casing that encloses the mechanism much more completely than formerly. This is of advantage in several ways. It protects the mechanism better'from dust, covers it from sight, and tends to prevent operators from meddling with it, and improve-s the appearance of the machine. There are three brackets. hereinafter called right, central and left.

The right bracket is a casting which nearly covers the right end of the framework and includes a portion which forms a wall extending behind portions of beam 23, the downwardly extending cross-footer section of the framework and mechanism which that section supports, and passing over some of the mechanism. This wall, 31, is the back of that bracket, which includes also the bracket-end 32 and the rear extension 33. This extension is fastened to the right side of post 5 by screws 34 and bushin s 35 and end 32 is fastened to the right en of beam 23 by the screws36 and 37 which also fasten plate 27 to the beam. and which'pass through holes 38 and 39 (Fig. 2) in the bracket.

erceivedi that the whole right-hand 'end'o the calwhich the headed screw 34 passes. the latter being screwed into the post 5. When the machine is assembled and the bracket occupies its correct relation to the calculator framework, each of the bushings 35 is screwed toward the left until its left end abuts against the face of the post 5. The screws 34 are then tightened, clamping the inner ends of the bushings tight against the post, thus rigidly securing the bracket to the post in exactly the correct position. -It

will be perceived that the construction is such as not to require any accurate surfacing of the post 5 or of the bracket, the bushings 35 being simply adjusted into contact with the 0st before tightening the screws 34. This right-hand bracket is av substantial casting and serves greatly to stiffen and strengthen the projecting right-hand part of the calculator framework, which is thereby considerably improved. This bracket may therefore be considered not only as a part of the casing of the machine but also as part of the I framework thereof.

The lower edge of the bracket is about even with the lower ends of plates 26 and 27 of the framework. End 32 has a forwardly extending portion 46 on the left face of which is a ledge composed of divisions 47 and 48, division 47 being near the upper and front edges of that portion and extending from the rear end of the upper edge forward and downward and having in it screwholes 49 and 50, and division 48 being near the lower edge and extending backward from the front end of that portion of the bracket.

The central bracket, which is a casting attached to the framework at the left end of the downwardly extending cross-footer section, comprises a body portion 51, a ledge 52, extension 53, led e 54, extension 55, and hubs or lugs 56 and 52011 body 51 and extension 53. The left end of hub 56 is in contact with the right face of plate 26 and a screw 58 passes from the right face of body 51 through the hole 59 therein (Fig. 2) and through the hub and plate and fastens the bracket to the plate. The rear edge 60 (Fig. 3) of the body 51 is vertical above hub 56. Below said hub said rear edge extends forward and downward close to, in front of and under rod 61, and thence backward and downward near the front edge and right side of plate 26 and a little in front of and below rod. 28.

In short, this part of the rear edge off thc central bracket approximately corresponds to the front edge of plate-26, whichplate .cure rod 67 and plate 66 together.

work of the calculating mechanism.

the bracket slightly overlaps as'shown in F 1g. 3. The lowermost portion 62 of body 51 passes under rod 28 and reaches nearly to the vertical plane containing the rear edge of cross bar 3, and extension 55 projects to the right from the portion 62 at the back thereof, the planes of the right face of body 51 including portion 62 and of the front face of extension 55 being vertical and forming a right angle. The left face of body 51 is in a vertical plane and ledge 52 which is fast on and near the front edge of body 51 and has the shape shown in Figs. 1 and 3, extends almost from end to end of the bracket. Extension 53, formed on the right face of body 51, includes the sections 63,64 and 65. The front face of section 63 is in an inclined plane that contains that portion of the front edge of body 51 which is at the left side of this section, and the rear face of this section is parallel to its front face. Section 64 extends backward from the upper end of section 63 and its faces are in horizontal planes. Section 65 extends forward and downward from sections 63 and 64 and has vertical faces which are parallel to the faces of body 51. Sections 63 and 64 may be described as a transverse web connecting the two parallel sections 51 and 65. Ledge 54 is on the right face of section 65 and right end of section 64. Hub 57, which projects from the right face of section 65 of the central bracket and passes behind ledge 54, is in contact with plate 66 at the left end of cross rod or bar 67, and the bracket isfastened to this plate and this rod, which are both included in the downwardly extending section of the frame work, by the screw 68 passing through section 65 of the extension 55, hub 57 and plate 66 and into the rod 67. This screw occupies the same position a screw formerly employed to so- In ledge 54 are screw-holes 69. The position of extension 53 and the outline formed by the edges of section 65 are such that if this outline were to be projected horizontally to the right it would lie on the upper, front and lower edges of section 46 of the right bracket when the right face of the section 65- had reached the plane of the-right face of the section 46. Ledge-54 would coincide with ledge 47,48 on the right bracket were ledge 54 to be horizontally projected to the plane of the left face of extension 46 of the right bracket.

The left bracket is also-a casting which forms the body 70 of the bracket and the ledge 71, lugs or hubs 72 and 7 3 and extension 74, and which is attached to the framelength, from top to bottom, is equal to that. of body 51 of the central bracket, and the faces of body 70'are 1n vertlcal planes and 110, right end of section 64 and front and lower 1 Its j its rear edge is perpendicular. Extension 74 comprises a vertical portion that forms a right angle with the body at its rear edge and extends therefrom to the left, the rest of the extension being the curved portion 7 5 which curves backward to post 4. The upper end of the left edge of portion 75 is near the upper end of the post and that edge,- from its upper end to the recess 7 (5 (Fig. 1;, is close to the right front edge of the post.

This recess or slot separates the lower portions of the post and bracket, the top and front side of the slot being formed by the bracket and the rear side by the post, and the slot is only wide enough to enable arms of a lever and rocking device that are hereinafter described to pass behind the bracket from the front of the post and to move freely in the slot. An opening 77 passes through extension 74 and body 70 near the upper end of the bracket. the right from body 70, and hub 72 makes contact with plate 78 fast on beam 23 at its left end, said plate 78 being the left end ate of the calculatorframework. Screw 9 (Fig. 1) passes through body 70, hub 72, and hole 80 (Fig. 5) in plate 78 and into the beam 23 to which it fastens the bracket. Thisscrewtakes the place of a shorter screw formerly employed.

The vertical gear shifting lever or handle 81, which is described in the aforesaid Patent, No. 1,270,471, and has long been in use in Remington machines, is mounted on plate 82 fast on plate 78, and on the left side of plate 82 is the fixed stud 83 on which is pivotally mounted the detent and centeringdevice 84 which acts at itsrear end on teeth formed on the under side of the rear arm of the vertical correcting lever. The detent 84 is pivoted on the reduced outer end of stud 83, and it has heretofore been retained in,

place by the fiat head of a screw. In the present construction hub 73 of the left coversupporting bracket herein shown and described, makes contact with the left end of stud 83 and takes the place of the former screw-head in retaining detent 84; and a longer screw 85 passes through body 70 of the bracket and through hub 73, detent 84, stud 83 and plate 82 and fastens the bracket to the stud and plate. Ledge 71, on the right face of" body 70 of this bracket, extends nearly the Whole length of the body a and has in it screw-holes 86.

The shape and position of the left bracket are such that if this bracket were to be projected horizontally to .the right until the right edge of ledge 71 reached the plane of the left face of body 51 of the central bracket,ledge.71..W011ld:.coincide with ledge 52 off-the central bracket; f Ledge 52 has c wol s. tex ending th ough it.

.Tlmtwoeovers which theabove described brackets support are formed from sheet other of a single piece.

Hubs 72 and 73 project to' metal, one consisting of three pieces and the The smaller cover (Fig. 2) includes the front and lower sections 88 and 89 formed 1n one piece and the divided upper section -90-9l, the divisions of which meet about midway between the ends of the cover. The opening 92 in the upper section is made by recesses cut in divisions 90 and 91 at their meeting edges, and in division 90 are other openings 93 and 94, these openings in division 90 being like those in the cover plate heretofore employed. The downwardly turned front margin 95 of the upper section overlaps and makes contact with section 88 close to the upper edge of said section 88 and extends from end to end of the cover. This cover fits at its right endon ledge 47-48 of the right bracket and at its left end on ledge 54 of the central bracket. Its front section makes contact with the front faces of the ledges, and its upper and lower backwardly extending sections pass over and under nearly alliof the actuating mechanism that is supported by the above described downwardly extending section of the framework. Screws 96 (Fig. 3) that pass through holes 97 in the cover and into the holes 69 in ledge 54, and other screws that pass through the holes 98 in the cover and into the holes 49 and 50 in the ledge on the right bracket fasten the cover to the brackets.

Upstanding lug 99 projecting from plate 100 comprised in the framework '(Fig. 1)

tached from the brackets, although it en-' .tirely surrounds and fits snugly against those lugs. The bar 102 is Well known in Remington accounting machines. It is the fixed bar which extends closely over the master wheel and lies behind and near the vertical plane that contains the axis of that wheel and back of and close to which bar travel the lowermost portions of the levers that support the Geneva wheels of the totalizer, as the totalizer moves over the master wheel in the operation of the machine. The right-hand end of cover section 90 rests on frame plate 100. Lug 101' has in it a nick 101* in which fits a corner of cover section 91, which is thereby supported at that point. Some teeth of the master wheel pass through opening 93, and through this opening also pass the aligning tooth standing close to and on the right of the master wheel, the aligning and spiral-correcting dog on the left of the master wheel,tthe upstanding lug 103 on plate 104 comprised in the framework, and the master dog, which are all well known devices that are embodied in Remin That section is made ton accounting machines. Opening 94 is a clearance opening immediately over a gear of the gear-shifting mechanism. It prevents the cover from interfering with operations of the gear shifting mechanism or wheels of the totalizer as it would if it were to be extended entirely over the gearing of the actuator, between which gearing and the wheels of the totalizer there is but very little space when the totalizer is over the gearing;

Thelarger cover (Fig. 2) fits on and is fastened by screws, to ledges 52 and 71 of the central and left brackets, the screws 105 passing through the holes 106 (Fig. 2) in the cover and into the holes 87 in ledge 52 of the central .bracket, and other screws passing through the holes 107 in the cove'r and into the holes 86 in ledge 71 of the left bracket. This cover includes the lower flat section 108 extending upward from the lower ends of the brackets, the-central section 109 extending upward and forward from the lower section, and the upper section 110 extending upward and backwardfrom the central section and backward from the brackets at their upperends which are above the level of the tops of the posts 4 and 5. The edges of the recess 111 in section 110 snugly fit against the casing which is commonly embodied in Remington ac counting machines and which extends upward from rod 61 and covers pdrtions of the calculating mechanism that are near the main master wheel, and nearly covers that wheel. The ordinary disconnect-lever extends through slot 112 in section 110 ofthe cover, and the vertical reversing lever 81 extends through notched slot 113 in the section 110; near its left edge, this portion of section '110 taking the place andv having the function of the escutcheon plate described in Patent No. 1,270,471 (specification'page 13. lines 85'93).

Remington accounting machines comprise calculating gears and other rotary calculating devices that are movable in opposite directions to enable either addition or subtraction to be performed, and those machines also comprise reversing mechanism which controls the action of such calculating devices and in. which is included an angular shift-lever, the power-end of which moves up or down in a reversing operation, and is connected by a link to a hand-lever called in Patent No. 1,270,471 (specification, page 13, lines 123 et seq.) the universal correcting lever; the calculating devices, the reversing mechanism and universal correcting lever, all being described in the patent. That angular lever, 114, a fragment of which is shown in Fig. 5, is called in the patent abell crank lever and called herein a shift-lever. The fragment shown forms the left end of the lever, which protrudes from behind the framework and extends over the hand-lever that ispivoted at 115 to the stud 116 fast on plate 82 (Figs. 4 and 5). This hand lever passes through opening 77 in the left cover-supporting bracket. The front arm 117 of the hand-lever has on it the key-head 118 and its rear arm 119' which is its load-arm is connected by vertical link 120 to shift-lever 114 at the left end of its power-arm. This link, called herein the shift-link, is pivoted to lever 114 by screw 121 and to arm 119 of the hand lever by stud 122. -Whenever key-head 118 is pushed down, this hand lever acts through link 120 on shift-lever 114 just as the universal correcting lever described in the patent acts on the shift-lever .through their connecting link, when the handle of the universal correcting lever is forced down with the hand and allowed to rise as soon as the hand is withdrawn from it. As soon as the head is withdrawn from the key-head 118 after it has forced the key-head down, this hand lever is restored to its normal position by lever 114 to which, as is made apparent by the patent, appropriate motion is then imparted by a spring. On arm 119 of this hand-lever, behind stud 122and close to the rear end of the lever, is the stud 123 fast on and projecting from the right side of the arm and having the head 124 (Fig. 4).- As

this hand-lever is above another hand lever yet to be described, these levers are hereinafter called the upper hand-lever and lower hand-lever respectively.

The lower-hand lever is mounted on the shaft 125 which is included in the ribbon mechanism and through which and connecting devices this hand-lever shifts the ribbon vibrator mechanism so that a number then recorded is printed in red. This shaft, together with'the rest of the ribbon mechanism of this machine, has long been in public use in Remington accounting machines and Remington typewriting machines. The shaft 125 is a rock-shaft and is supported at its front end by and has abearing in bracket 126, which has arms 127 and 128. This bracket extends behind. the front wall of post 4 and screws 129 passing through that wall fasten the bracket tothe post. Arm 127 and some of arm 128 are on the right of the post, and behind the left cover-supporting bracket which has been described. Rock slot 76 and across the front of-post 4, and

on this arm at its left end is the forwardly projecting wrist pin 135. This wrist pin supports a rocker which consists of the body 136, opposite and forwardly extending key arms 137 and 138, key heads 139 and 140 fixed to the'key arms at their front ends, and the slotted guiding and locking arm 141 which includes the backwardly extending section 142 connecting the slotted section of the armto the body of the rocker, and which forms the lower portion of the rocker. Body 136 is mounted loosely on the wristpin 135 which extends through the body, and key arms 137 and 138 extend to the left and right respectively from the vertical plane that contains the axis of the Wrist-pin. The slotted section of arm 141 curves to the right from its upper to its lower end and passes through slot 76 and in front of bracket arm 123', fast on which at its lower end is the forwardly projecting stud 143. The slot 144 in rocker arm 141 has concentric curved edges 145 and 146, and includes the notch 147 forming with edge 145 the shoulder 148 near the upper end of the slot. Stud 143 passes loosely throughthis slot, the back of the rocker arm being close to the shoulder 149 of the stud. The load-arm 132 of this hand lever has the link 150 pivoted thereto by pin 151 having keeper 152, and this link at its upper end has a slot 153 through which the headed stud 123 extends from the upper hand lever. When both hand levers are in their normal positions stud 123 is at the lower end of slot 153. When the lower hand lever is in its normal position and the keyhead of the upper lever is pressed down, stud 123 travels freely in slot 153 and the lower hand lever does not move. The lower lever is shown in its normal osition'in Figs. 4 and 5. The stop lug 154 ast on the back of arm 131 of this lever acts on the stop pin 155 fast on the supporting bracket so as to limit the upward movement of the left end of the lever.

In operation, the upper hand lever is usually used where a short correction is to be made and where it-is desired not to change the color of the printing. The key 118 is depressed and held down by hand while the numeral key or keys are being struck, and it returns to normal position automatically as soon as it is released. I When this key is depressed, stud 123 moves idly in slot 153 so that the color-controlling shaft 125 is not operated. a The lower hand lever is usually employed where it is desired to enter a number into the machine in a manner the reverse of normal and where it is desired that that fact be indicated by a difference in the color of the printing. For example, 1f goods sold Were being listed, an item of goods returned would be Written in red and entered in the calculating mechanism in a direction the reverse of goods sold. In this event, the key 139 would be depressed, which would rock the shaft 125 to change the color of the printing and, through link 150, would operate to reverse the gearing of the calculating mechanism. WVhen the key reached the bottom of its stroke the finger pressure on it, being applied at the left of pivot 135, would cause piece 136 to rock so as to catch notch 147 and shoulder 148 over stud 143 and lock the parts in operated position. The operator could then remove the finger from key 139, which would remain in depressed position until released. That would be done by a tap of the finger on key 140, which would rock piece 136 so as to release it from stud 143, whereupon shaft 125 and the parts connected with it would be restored to normal by the usual returning spring (not shown). Lever 114 may be actuated and allowed to return instantly afterwards to its normal position, if the lower'hand lever is operated by pressure applied to key-head 140 instead of key-head 139, but the color of a figure printed while the key head 140 was being held down would be red.

All of the functions above described can be performed with the mechanism heretofore used in the Remington accounting machine and described in the Wahl Patent #1,27(l,471 but the present mechanism is much more convenient in use and less likely to lead to mistakes. In the former mechanism there. was a universal reversing lever in about the situation of the lever 117, 119 and said universal lever was provided with a hand operated latch by which it could be retained in depressed position if desired; and said lever was also provided with connections to the bi-color mechanism which connections could be established or broken at will. That universal connecting lever therefore performed the functions of both of the present-hand levers. There was danger however, that the operator would get into the habit of latching the lever down and that she would sometimes forget to restore it; and the making and breaking of the connections to the bi-color required attention and might lead to confusion. In the present instance the operator is taught to use the key 118 for making corrections and the key 139 for entering items into the machine reversely. The key 118 has no latch to hold it down and there is therefore no danger of the operator forgetting to return it. The rovision of a separate key for entering ltems reversely and in adistinctive color makes for convenience in use and avoids confusion. If the operator should forget to restore this key an error will result, but it will show in the written record because the item will not only have been entered reversely in the calculating mechanism but it will also have been Written in red so that the error will be apparent.

The Remington accounting machine contains full-stroke mechanism including-a universal pawl bar 156 (Fig. 3) which 1s adapted to act on certain fans 157 which are operated from the numeral key levers by links 158. Since it is sometimes desirable to swing said universal-pawl bar upward by hand to disconnect it from a fan and since the above described larger cover prevents access to that bar from the front of the ma-- the large cover attached to the central and left cover-supporting brackets. The pivotal axis of the pawl bar 156 is horizontal and extends crosswise of the machine and lengthwise of the bar and the pawl is downwardly inclined from its pivotal axis to the fans. The pawl-rocking hand-lever is supported by and pivoted on the stud 159 which is fast on beam 23 and projects backward from it and over the pawl-bar. The lever is pivoted to the stud by the screw 160, the axis on which the lever turns being horizontal and extending lengthwise of the machine. The power arm of the lever is composed of the laterally extending portion 161 (Fig.

'1), and downwardly extending portion 162 (Figs. 1 and 3) bent at 163, 164, 165, and 166 (Fig. 3), and having at its lower end the finger rest 167. This arm passes behind other mechanism and portions-of the framework and behind extension 51 of the central cover-supporting bracket, but the lower end of the arm is on the right of portion 62 of body 51 and in front of extension 55 of the bracket so that this end and fin er-rest 167 are exposed and within reach of t e operator.

The bends make the arm clear portions of the framework and calculating mechanism. The load-arm of this lever is composed of the laterally extending portion 168 and downwardly extending portion 169 which passes behind the pawl-bar 156 and has at its lower end the forwardly extending finger 170 which passes under the pawl-bar. The stop-pin 171 fixed in beam 123 and project ing through hole 172 in this arm limits the rocking movement of the lever, and spring 173 connected topin 174 fast on the power arm and to pin 17 5 fast on beam 23, tends to keep the upper edge'of hole 172 in contact with stop pin 171 and to keep finger 170 out of contact with the pawl-bar when that bar is engaged with a fan.

To release a fan from the pawl-bar when a numeral key has been partly depressed, or to prevent the pawl-bar from acting on a fan when it is desired partly to depress a key and allow it to return instantly to its normal position, finger rest.167 is pushed to the left until the movement of the pawlrocking lever is arrested by stop pin 171. Finger 170 is thus raised and acting on the pawl-bar rocks that bar away from the fans and allows any fan to turn backward.

Various changes may be made inthe de-' tails of construction and arrangement without departing from my invention.

What I claim as new and desire to secure by Letters Patent is 1. In a combined typewriting and calculating machine, a frame which supports boththe mechanism of the typewriter and the framework of the calculating mechanism' and which is composed of a base, rear posts and a front post similar to those of a common typewriter frame, a special front post, and a special top plate, the special post havingat its lower end a .protrusion which is secured to the base in the same position as the ordinary front post of the typewriter and the rest of the special post being behind a transverse vertical plane that cuts the base near the back of said protrusion, and the special top plate fitting on and being attached to this special post and the three others and having upwardly and forwardly extending lugs to which the framework of the calculating mechanism is attached and which lugs have front faces with which the back of that framework makes contact and which are in a vertical plane that cuts the base near the front edges of the beds-of the front posts.

2. In a combined typewriting and calculating machine, a frame which supports both the mechanism of the typewriter and the framework of the calculating mechanism and which is composed of a base, rear posts .and left front post similar to those of a common typewriter frame, a special right front, post, and a special top-plate, the special right front post having at its lower end aprotrusion which is secured to the base in the same position as the ordinary right front post of the typewriter and the rest of the special post being behind a transverse vertical plane that cuts the base near the back of said protrusion, and the special top-plate fitting on and being attached to the special post and the three ordinary posts and having upwardly-and-forwardly extending lugs to which the framework of the calculating mechanism is attached and which have front faces with which the back of that framework makes contact and which are in a vertical plane that cuts the base near the front edges of the beds of the front posts, said framework including a portion that forms a support for a cross totalizer alone, and that portion being in front of the special right front post.

3. In a combined type-writing and calculating machine, a machine-frame in which front posts and a top-plate are'included,

. anism and which is attached to the topplate and projects beyond it at the right side of the frame, and in which is included a downwardly extending section that is next to the right end of the framework, and a bracket attached to the right front post of the frame and extending therefrom behind the projecting portion of the framework to and across the right end of the framework and attached to that end of the framework.

5. In a combined typcwriting and calcuwting machine, a machine-frame in which front posts and a top-plate are included, framework which supports the calculating mechanism and which is attached to the topplate and projects at one end beyond the machine-frame, and a bracket piece to which the projecting end of the framework is secured and which is secured by adjustable fastenings to one of said front posts.

6. In a combined typewritin'g and calculating machine including typewriting and calculating mechanism, the improvement which comprises a special front post for the typewriter frame having at its base a foot protrusion that can be secured to the base in the same position as an ordinary post, the shaft of the post being back-set to make room for the calculating mechanism.

7. In a combined typewriting and calculating machine, a frame in which front posts and a. top plate are included, framework which supports the calculating mechanism and which is attached to the top-plate and projects beyond it at the right side of the frame, and in which is included a downwardly extending section that is next to the right end of the framework, a bracket attached to the right front post of the frame and extending therefrom behind the projecting portion of the framework to and across the right end of the framework and attached to that end of the framework, another bracket attached to the downwardly extending section of the framework near the left end of that section, and a cover that is attached to said brackets and includes a front section and upper and lower sections that extend backward from the front section.

S. In a combined typewriting and calculating machine, a frame in which front posts and a top plate are included, framework which supports the calculating mechanism weaseo and which is attached to the top-plate and in which is included a downwardl extending section that is next to the rig t end of the framework, a bracket which is attached toand extends downward from the left end of the framework and which extends to and lengthwise of the left front post and to the lower end and nearly to the upper end of that post, another bracket attached to the downwardly extending section of the framework near the left end of that section, and

- a cover that is attached to said brackets and includes a lower flat section, a central section, and an upper section, the upper ends of the brackets being above the level of the tops of the posts and the lower ends of the brackets being near the plane that contains the lower ends of the osts, the lower section of the cover extending upward from the lower ends of the brackets, the-central section extending upward and forward from the lower section, and the upper section extending upward and backward from the central section and backward from the brackets at their upper ends.

9. In a calculating machine which includes a front cover and a pawl consisting of a bar having an angular movement on a horizontal axis extending lengthwise of the bar and crosswise of the machine, the pawl being behind the cover and downwardly inclined from its axis to devices on which it acts, a pawl-rocking hand-lever which is pivoted between its ends and behind the covor on a horizontal axis extending lengthwise 1 of the machine, and has its load-arm extend-- ed under the pawl, all of that arm and a portion of the power-arm being behind the cover and the power-arm projecting beyond the cover and being exposed at its outer end.

10. In a calculating machine which includes a pawl consisting of a bar having an angular movement on a horizontal axis extendmg lengthwlse of the bar and crosswise of the machine, the pawl being downwardly inclined from its axis to devices on which n it acts, a pawl rocking hand-lever which is pivoted between its'ends and above the pawl upon a hOIIZOIItal axis extending lengthwise of the machine, and each arm of which comprises a laterally extending portion and a downwardly extending portion, the loadarm and some of the power-arm being behind other mechanism andportions of the framework, the load arm passing behind and under the pawl, and the downwardly extending portion of the power-arm being exposed at its lower end.

11. In a calculating machine comprising calculating devices that are movable in opposite directions, and reversing mechanism which controls the action of those devices and in which is included a shift-lever, the combination of an upper hand-lever, an operating connection from said hand-lever to 1 said shift lever, a lower hand-lever, a slotted connecting link whereby the motion of the lower hand lever is communicated to the upper hand lever but the motion of the upper hand lever is not communicated 'to the lower hand lever, a rocking device, .and a guiding and locking stud, the upper handlever being mounted on the framework, the lower hand-lever being connected with the ribbon shifting mechanism of the machine and the power-arm of this lever having on it a wrist pin, the rocking device being loose- 1y mounted on said wrist pin and having op posite key-arms and key-heads and having a guiding and locking arm containing a slot, and the guiding and locking stud being rigidly attached to the machine-frame and proj ecting into the slot in the guiding and locking arm of the rocking device.

12. In a calculating machine comprising calculating devices that are movable in opposite directions, and reversing mechanism which controls the action of those devices and in which is included a shift-lever the power-end, of which moves up and down when a reversing operation is performed, the combination of a unitary key-lever and key, a shift-link, a hand-lever, a connecting link, a rocking actuating device and latch, and a ui ding and locking stud, said key-lever bemv mounted on the framework, the shiftlirili being pivoted to the shift-lever at its power-end and to the load-arm of the key lever, the hand-lever being attached to arock-shaft included in the ribbon mechanism of the machine. and the power-arm of the lever having on it a wrist-pin, the connecting link being pivoted to the load-arm of the hand-lever and so connected to the load-arm of the key-lever as to make the link effective to move the key-lever when the hand-lever is actuated and inca able of preventing movement of the keyever from and to its normal position when the hand-lever is in its normal position, the rocking device'and latch being loosely mounted on said wristpin-and having opposite key-arms and keyheads. and having a guiding and locking arm including a cletent and forming the lower portion of the device, and the guiding and locking stud being rigidly attached to the machine-frame and arranged to coact with one edge and With the detent of the guiding and locking arm' of the rocking device and latch.

13.. In a calculating machine comprising calculating devices that are movable in 0pposite directions, and reversing mechanism which controls the action of those devices and in which is included a shift-lever, the. combination of a umtary key-lever and key, a hand-lever, a shift-link, and a connecting link, the shift-link. being pivoted to the power-arm of the shift-lever and to the keylever, the hand-lever being attached to a rock-shaft included in the ribbon mechanism of the machine, and the connecting-link being pivoted to the load-arm of the handlever and so connected with the shift-lever as to make the connecting-link effective to move the shift-lever when the hand-lever is actuated and incapable of preventing movement of the shift-lever when the key-lever is actuated and the hand-lever is in its normal position. g g 7 14. In a combined typewriting and calculatin machine comprising typewriting mechanism that includes color-changing mechanism, and calculating mechanism adapted to be reversed for addition and 8 subtraction, the combination of a key connected to change the color and to reverse the calculatin mechanism .in both directions,

a releasab e latch for holding said key in operated position, and a second key. con- 8 nected to reverse the calculating mechanism in both directions but incapable of changing the color and of being latched.

Signed at the borough of Manhattan, city of New York, in the county of New York 9 and State of New York, this 9th day of Sept. A. D. 1924.

FREDERICK A. HART. 

